Polishing wheel



Dec. 15,. 1925- D. F. M GOVERN POLI SHING WHEEL Filed March 20. 1924 2 Sheets$heet 1' Dec. 15, 1925- D. F. MCGOVERN POLISHING WHEEL 2 Sheets-Sheet 2 Filed March 20, 1924 wanna) JanielEMfiovern liter! i use in power machines.

Patented Dec. 1 5, 1925.

POLISHING WHEEL.

PATENT oF icE.

DANIEL F. meeovnnn, or MONTPELIER, VERMONTRE Application filed March 20, 1924. Serial No. 700,721.

To all whom it may concern:

Be it known that I, DANIEL F. MGGOVERN, a citizen of the United States, residing at Montpelier, county of IVashington, State of Vermont, have invented certain new and useful Improvements in Polishing Wheels, of which the following is a specification.

This invention relates to polishingor ironingwheels, and involves; certain improvements over my prior patent Reissue No. 15,245, granted December 6, 1921.

Although the wheel ofmy saidreissue patent was particularly intended for use in hand machines, it. has been foundfvery satisfactory in the smaller-sizes thereof up to say a wheel thirty-eight inches in diameter when used in a power machine. The development of the power machines, however, has called for larger sizes of Wheels and difficulty hasvbeen experienced in adapting the larger sizes of my said patented wheel for This has been'due to the inability of the patented wheel in the larger sizes to utilize the abrasive under the increased diameter and greater speed of power machines. Where there is an unequal distribution of abrasive, the efliciency of the cutting action of the wheel is reduced and the time required for polishing is increased.

To the end therefore of producing a polishing wheel in sizes particularly adapted for power machines, but which may also be used for hand polishing, I have devised my present invention. In it, I provide for the more complete utilization of the larger abrasive capacity of the large wheels as compared with my smaller patented wheel and with consequent increase in cutting efficiency. Moreover, I practically double the cutting action of the'wheel by so rearranging the segmental flanges thereof as to not only provide an-increased' internal abrasive distribution for the wheel but to insure adequate utilization of the abrasive drawn in at the several peripheral intake openings of the wheel through the feed channels thereof so that the abrasive is effectively distributed across the entire working face of the wheel.

Choking of the channels at their narrowing discharge endsis prevented by sub-dividing the flanges into a plurality of substantially sector shaped flange sets, each set being spaced sufficiently apart from the next adjacent sets so as to provide generally radial throats or aisles along which the abrasive discharging from one flange set may be transferred inwardly across the face of the wheel into the next following flange set. centric to the axis of rotation of the wheel so that the flanges of one set do not accurately track those of the preceding set but catch the abrasive as it redistributes itself in the aisles between the groups.

The construction and operation of my wheel, together with selected embodiments which well illustrate the principles involved and are in themselves forms found satisfacaccompanying specification and drawings,

and the characteristic features of novelty are particularly pointed out in the appended claims. Throughout the specification and drawings like reference characters are correspondingly applied, andin the drawings:

Fig. 1 is a side elevation of one form of polishing wheel in accordance with my invention.

Fig. 2 is a face view thereof, and

Figs. 3 and 1 are corresponding views of a modification.

I have indicated generally at 1 the plate or discof the polishing wheel, at 2 the central mud discharge opening-thereof, and at 3 the attaching lugs which receive the driving shaft.

In the form of my invention shown in Figs. 1 and 2, the working face of the disc 1 is provided with a plurality of segmental flanges arranged in the form of four spaced sector shaped flange sets as indicated A, B, C and D, and in the form of my invention shown in Figs. 3 and 4, there are only three sector shaped flange sets, as indicated at E, F and G.

In both forms the flange sets are symmetrically arranged over the working face of the wheel, the flanges of each group being substantially concentric to each other but each flange set being slightly eccentric to the axis of rotation of the wheel. The flanges of each group are duplicates of the corresponding flanges in any other group so that the flanges may be interchangeably applied to the wheel and the spaces or aisles S separating theflanges of one group from those of the next flange group are relatively staggered as to each other so that the abrasive discharging thereinto from a pre- The sector shaped flange sets are ec- Lil) ceding flange set may redistribute itself before itis taken up by the next following flange group.

The individual flanges of each flange group are developed on the same relative curvature, but the centers from which the flanges in said group are struck as arcs of a circle are shifted progressively closer to the geometrical center of the disc 1 the flanges approach said center. This is indicated diagrammatically in Fig. 2 by the several radius lines T.

The outermost or leader flange of each set starts at the periphery of the disc 1 and overlaps the adjacent aisle or space S. The included flanges A A A and A of the set A start at points in rear of the leader flange A but in the same general plane as to each of the flange sets.

The abrasive drawn into the flange sets by the leader flanges at what may be called the peripheral intake openings of the wheel passes through the feed channels defined by the flanges and discharges into the spaces S separating the respective sets of These spaces permit a redistribution of the abrasive so that it may be taken up by the next following of flanges and progressively worked towards the center of the disc. The eccentric arrangei'nent o'i' flange sets disposes the leading ends at the flanges of one set slightly offset to the heel ends of the flanges ot' the preceding set so that the flanges do not accurately track each other.

In Figs. 3 and l the flange arrangement is similar to that shown in Figs. 1 and 2 except that the Working face of the Wheel is sub-divided into only three groups 01": flanges instead of into four groups as shown in Fig. 2.

Various other modifications in the con struction and arrangement of the flange sets may olwiously be resorted to within the limits of the appended claims.

TFhat I therefore claim and desire to se cure by Letters Patent is 1. A polishing wheel comprising a disc having on its working face radially spaced groups of segmental flanges. the spaces between said groups being relatively staggered as to each other and constituting uninterrupted aisles extending from adjacent the center of the disc to the tips of the outermost flanges 01 said groups and the tips of the outermost flanges of said groups start ing at substantially the periphery of the disc and overlapping the discharge ends of said aisles and constituting with the included flanges of its group a spaced series of abrasive intake openings.

2. A polishing wheel comprising a disc having on its working face radially spaced groups of segmental flanges. the spaces between said groups being relatively staggered as to each other and constitutir uninterrupted aisles extending from adjacent the center of the di c to the tips 0! the outermost flanges of said grou and the tips of the outermost flanges oi said groups startat suhstai'itially the periphery of the disc and overla-p 'iing the discharge ends of said aisles and constituting with the included flanges of its group a spaced series of abrasive intake openings, said incli'ided flanges of each groiip all si rising at spaced points disposed in subs llloltlllj' the same plane and all of the flanges of each group, includinc' the outermost flange thereof, termiuati g i substantially the same plane.

3. A polishing wheel corn irising a disc having on its working ace at least three sets of segmental flanges syn'uuetrically arranged in sector-shaped groups the outermost flanges of each flange group starting at substantially the periphery of the disc and constituting with the included flanges of the group spaced series of abrasive intake openings, and all or" the flanges of each group terminating in substantially the same plane.

In testimony whereof I atiiiz my signature.

DANIEL F. ldoGOVERN. 

